1、as found in nature in the elemental form.

2、Gasification liberates this in its elemental form, making it easy to recover.

3、Although life is, in essence, a complicated form of carbon chemistry, living creatures cannot process carbon in its elemental form.

4、The copper sulfate reacts with the elemental iron to form ferrosulfate, and the copper is reduced to the elemental form, which precipitates out in a settling trench. The process is summarized in the following reaction: